Wheel-feed for grinding-machines.



fc. H. NORTON.. WHEEL lFEED FOR GR'INDING 'MA-CHINES.

APPLICATION FILED JULY 22. |914.

Patented June 1, 1915.

2 SHEETS-SHEETI c. H. NORTON. WHEEL FEEDAFOR-GRINDING MACHINES;

APPLICATION H Len 1 uLY 22. 1.9M.

' Patenten-'m1, 19157.

2 SHEETS-SHEET 2.

A i n. 00H0 invrn sa 4ns PATENT OFFICE..

chiennes H.. NoiiToN, Or'fwonons'rnn, MAssAoiiUsETTs,,nssrGNOn To NORTON 'onrNnINe COMPANY. WORCESTER, MASSACHUSETTS, A CORPORATION OF '6" 'KSSACHUSETT menace.

Specification of Letters Patent.

yNEEIlli-:FEED vFR GRINDING-MACHINES.

Patented-June 1,1915.l

original appneaiion ine-a vrune e, i913,- s'eriai No. 772,055.l niviiieaf'ana this 'appiibation' nied'iiyaz,

' i914. seriai'No. 852,386.

To all whom t may concern: l

Be .it known that 'CHARLES H. NORTON,

a citizen of Vthe Unite-d States, residing at lilorcester, in the county of TWorcester and State oflhlassachusetts, have invented a new' especially cylindrical surfaces, and thist is a division of my application on a cylindrical grinding machine, iil'ed June 6, 1913, ASerial The principal objects of the invention are to providea machine of this character of a simple construction in comparison with the kind of work hat .it accomplishes and ca-l pable o-be'ing'fully controlled and manipulated by an'operator in a comparatively simple way; to provide improved means whereby the automatic reverse automaticallyfeeds the wheel forward a step at each end of the reverse, and means whereby this t'eed also can be Operated'by hand either zit- 4 v'normal 'speed or very slowly..

mprovements The invention alsoinvolves 1 in combinations of parts and details of construction of thewheel fee'd'as will appear hereinafter. V V

Reference is to be had to the accompanying drawings, in whic'ho L Figure l is' a sectional view of a wheel` feeding mechanism constructed in accord- 35 ance with this invention; Fig; 2 isa frontview of a portion of the machine with parts of the wheel feed thereon; Fig. 3 isa detail of the pawl mechanism; and Fig'. 4 is a sectional view on the line 4 4 of Fig. 2.

The machine is shown as comprising a vmain casting' `or 'base A 'on which operates a" sliding table B mounted in longitudinal wayson the top of the hase.` The lwheel slide C operates' in ,trans'verse ways toward.

and from the sliding table whichis designed to support thework. he sliding t'a'lole Bis provided with the usual-dogs B. which are designed t-oengag'e reversing leverl 40. and operate it.: The

Operation ofthis leverwil'l not be described herein, as it lis a'ffeaturgeof thecase .from ixfhich'this is divided, .f

- ylhe reversing lever :is provided rwith a meshes with both gears.- A lpin 68 on a hand-wheel 6 notches'72 vfor'receivingthelock' that thesejparts may belo'cked togeth "ny desired relativeposltion.- A. stop'j' v- 'jection Oni-the bottom of the'wheel slideC.`

roller 51 which is designed to engagea proyjection on" a feed lever 52 at the bottom.V This lever Operates a bell crank 53 pi-voted to swing on a' shaft 5i; The connection -between the lever 52 and 'the crank 53 -is through'a screw 55 having adjusting nuts 5,6. The screw 5,5 isguided at its lower end' in an externallyl threaded socket 57.' The feed lever 52 is held up by a spring-pressed buffer 58 which yields to allow the-reversing lever i0 to move overt-he' projection thereon which is located in the path of the roller 5l. The bell crank'is provided with' two pawls 60'designed to work in a series of teeth 61 on the edge of a ratchet wheel 62. j

These pa'wls are so spacedthat first one engages a 'tootlrand then thev other engages' another tooth.' Thus the teeth do not 'haveto be spaced as finely as they would with a single pawl. These teeth extend throughout afpart only of the circumference of this ratchet wheel. This wheel is fixed to a .gear 63 loosely mounted to rotate'on abushing 64, which' bushing'is keyed to the .shaft Keyed to the shaft 54isa gear 65 having-a longhub,'thegear 65 having one-moretooth thanthe gear 63. Adapted to engage both of thesel gears is jasliding pinion- 66 Operated by \a handle 67'. This 'handle'can bepulled out so that the pinion 66 will mesh only with the gear 65 or it' can be pushed into the position'shown in F ig. 4, in whichit` ves to hold the handle' 67 in either o treme positions, the handle. nndfpiiii n .being supported by the hand wheel. y'.

The ratchetwheel-GQ is'provided with 'ai spring-pressed lock "lif'fThe hand wheel` is provided with 1an index plate having- OtedI atA the side thereof to eng'gii'ge ','Ihefshaft 54 constitutes laf wheel Afeed screw,I and fortha't purpose is provided with screw threads ,on theend which 4engage in a nut 75nedjto hub"76l secured,in.a prO-.

A wei 'ht 77l supportedbya chain 78ffxe'd` to the 'ttom ofjthis l hub and passing over?.

spring;-pressedl A anidler serves normally to hold the wheel slide back. The interior of the hub 7 6 is oiled. through a passage 79 having a cover 80. A door 4Slfis provided 'on'the base A foraccess to these parts.

` When the handle 67 is pulled out, the

'hand Wheel canbe rotated idly, but the slide cannot be operated either by hand or'power. f When it'isfdesired to feed the wheel slide either by hand or power, the handle 67 must be -push'edin so that the pinion .66 will mesh' with'bothgears 63 and 65,

Tofeed the slide directlyjby hand toward thel vwork which, is carried by the sliding tablefB, the ratchet wheel 627and the index f4 plate'l Aare locked together by means o f thev lock 70,' and the paw1s '60 are .moved up- Ward to-` inoperative position. The hand 'wheel- 69, indexplat'e 71, ratchet wheel 62 andfgear'63 may then be rotated as a sin le elemente' .The lpinion 66 alsomoves with' them about theaxis of the shaft 54 but with- -out'turr'ng on itsj ownaxis. In this mane ner the gear`65 is forced to rotatefwith 'the` hand wheel 69vand, as the gear 65 is keyed 'to the shaft v54, -the elfect of these :connecj .tions is to cause the shaft 54 to rotate in l unison withA the hand wheel 69.

r. AWhen it isdesired-to feedlthe wheel slide Vf forwardvery slowly by'hand,'the plate 71 pis' released by throwing back ,the lock 70' "andthe plate 62 is locked in' .stationary position by` the stop 73 'enga 'ng the .lock 70.'. Thev rotation of Athe han causes the screw 54 to rotate, but thesrate .I of rotation is very greatly reduced by the 'differential gears; 63 and 65,l thev difference the number of teeth in these gears-causing -a `very 'slow rotation ofthe gear '65 when the gear 63 is held stationary; When 'the screwf54 is tobe Arotated by power, the ratchet .wheel 62` and the plate .71 are locked togethery andl set so that 4the p awls -60 engage :the ratchet-'teeth 61 near The reversinglever 40 acting through the lever 51 causes the oscillation of' the feed lever" 53 at each'end of the'. traverse AAof thel table, thus positively -movin g the pawls 60 'to feed ltheratch'et plate 62- 'forward a certain definite am0unt. 'In this way the feed screw 54 willbe turned to advance the wheel slide a measured distance at each ,reversal of the travel of the table, through the con nections previously described in connection with the feed of the table directly by hand.

v'For the purpose of rotating the grinding` Wheel the belt 119 passing over an idler and tlghtelier 120, operates a shaft 121. .On this S "a tght'bya'tightener A124', ov crates the grinding wheel shaft 126 onw the grinding wheel Eis located.V rI he tightener positionf-for'performing its :tuncfg` ichag y ya .Weight 125.

'screw, means for positively` connecting the lhand wheel will be transmitted. t`o the 'feed' -is :1 -pulley 122'which b'y-belt 123, kept in the art Withoutdeparting rom the scope of the inventionas expressed innthe claims. Therefore I do not wish to be `limited in these lrespects, but 1 AWhat I do clai.m;is:

1. In a grinding machine, the combination of a feed screw, a grinding .wheel slidey 'connected therewithand operated thereby, a hand wheel and a ratchet wheel both inL dependently and rotatably mounted With'respect tothe feedscrew, slow speed gearin comprising-1 a gearxed to the ratchet whee for c onnectingthe hand wheelwith the feed ratchet wheel and hand Wheehwhereby the feed screwjcan be operated directly by the handjwheeh and means whereby said gear 4 can bei-disconnected from. the handwheel.-

'2. In a'I grinding machine, the combination of afeed screw, a grinding wheel slide 'connected therewith andoperated thereby a hand wheel', al ratchet wheel, slow spec gearing. comprising a member secured -to the ratchet wheelfor connecting thehand wheel-with the feed'screw,fmeans'for oper-v atin the ratchet wheel by power, and means vfor. ocking lthe ratchet wheel in stationary position, whereby the hand rotation 'of the screw through the slow gearing@ 3. Ina grinding' machine, .the combination of a vfeed screw, a grinding wheel slide connected therewith and operated-thereby, the lefth'and end ofthe series of teeth.

ahand wheel, 'a ratchet wheel, slow "speed gearing for connecting the hand wheel with the feed screw, meansfor operating the i Screw means-for. operating'thef-rathgt when y gsltvsly ,connecting the mwhetwhlfedr. andfrlheeL- whreby l no by power; means `for 15:. can be made thereln by any crson skllled aor 1215v slow speedjgearing.

'the feed screw can be operated directly by the handY wheei, vmeans for locking the 1 ratchet wheelin stationary position when the ratchet and hand wheels'are not locked together, whereby theiiand rotation ofthe hand .wheel will be 'transmitted to the ,feed

s'crewthrongh the 'slow' gearing, and means. whereby said slow gearm can be discon- 'and l.disconnectedc therefrom, ay ratchet device connected with said feed screw comprising a pawl, a ratchet wheelv having teeth thereonin position to Abe engaged and op-A eratedb'ysaid -pawl, means for fixing said.'

ratchet wheel with respect'to. the hand .wheel when desired, and means whereby' said ratchet' wheel can be locked positively in 'stational-y position to permit a slow hand feed.

In. a grinding machine, the combination. with awheel siide, of a feed screw for adapted to be positively' connected thereto di sconnected therefrom, a ratchet. device Y connected with said feed screw comprising hand wheehmeans for locking said ratchet an osciliatabie member having a pawl thereon, 'ratchet wheel having teeth in the edge in-po "ion to vbe engaged and-:operated by said parti, aplate fixed with respect to said 'wheel to the piate where desired, means "whereby said ratchet wheel'can be locked positively in stationary position, and means whereby the rotation of the hand wheel -can be transmitted to the A`shaft .at a comparativeiy low speed. f

7. In' a grinding machine, the combination with wheel slide, of a feed screw-for operating it, a hand vwheel on the feed screw adapted to he positivelyconnected` thereto and disconnected therefrom, a ratchet device ,connected with, said feed screw, a ratchet Wheei in position to be engaged and operated by saidv ratchet device, a plate fixed with respect to said hand wheel having edge notches, a lock pivoted on the ratchet wheel and adapted to engage insaid, notches for locking said ratchet wheel to the plate, and means for eingaging4 said lock when removed from the plate whereby said ratchet .wheelv can be locked positively in stationary` po sition.

' 8. .in a grinding machine, the comblnation of a feed screw, a grinding wheel slide.' connected .therewith and operated thereby,l a ratchet `wheel rotatably mounted on the 5 screwed-and having. ratchet teeth.-

' throughout part of its circumference, a

pivoted locken the ratchet wheel at-its poru ltion not provided `with teeth, a hand wheel 'fhaving notches adaptedtoi'be engaged by.- 'th';;locl :l to lock it to the ratchet wheel,

means for turning the ratchet wheel by a slow motion, and meansconnected with the hand wheel' for transmitting motion, to the feed screw from the V hand wheell orratchet wheel.

'9. In a. grinding .tliel tion with awheel slide,.of a feed screw for operating it, a ratchet'wheellooselymounfed on the feed screw, 'means`-for transmitting the rotationl '.of thefratlchetfwheel to 'the feed screw 'at alo'w speed,andy means 1 for operating the ratchetwheelcornprising a member oscillatably molinted on said ifeed 'screw and having twopagivlspivoted there"- .`on in alinement with each other, y,the'fdistance. between the operative edges .offsaid -pawls being greater than' thefspace between two-of the teeth flthefrat'chet ,wheel and less than the sum ofthe spaces 'between said twov teeth and. that coveredby they next tooth. i., f

10. In a grinding machine-,the conibina-l tion of'a grinding wheel slide,'a feedascrew connected therewith for feeding said vslide operating 1t,'a hand wheel on the feed screwback `and forward, a ratchet wheel.rotatably mounted fonl said screw-afhandwheel,rota--- tabiy mounted on said screw, fa .geariixed to the screw, a vsecond gear-havinga different number of teeth butofsnbstantiallythe same diameter as theiirst v'named geanand fixed with respect to saidfratchet wheel, a

wheel, a reciprocable Werl; table, areversing lever therefor, and n leans,l connected with said reversing lever "for operating said ratchet device,

. 11. Inv agrinding machine,`the combination of a grinding wheel slide, a feed 'screw connected therewith' for feeding said slide `back and forward, av ratchet wheel rotatably mounted on said screw, a gear fixed to the screw, -a second gear' having a different num- .ber' ofteeth but of substantially the saine -diam-eter as the 'first named gear and .fixed with respect to saidv ratchetv wheel, a slidable pinion adapted to mesh with both of said gears l in `|one position thereof and with the firstnamed gear lin the other position,

a hand wheel Arotatably mounted on said f screw, means o n said -ratchetwheel for locking it tothe hand wheel whendesired, and

ya ratchet' device for operating the lratchet'.

wheel by power. j

12. In a grindingmachine, the .combination ofpa feed screw, a'ha'nd .'wheel, a'gearf i'Xed to the feed. screw, a concentric gear with. a different number/of teeth rotatable with respect to'the `feed screwfapinion adapted to; mesh withV both of said gears,

pinion.

means for holding the second gear stationarv,V .whereby the rotation of the hand wheel' tion with a grinding wheel slide and a feed screw connected. therewith for feeding it,

Aof-a hand wheel rotatable on the feed screw,

agear fixed to the feed screw, a`concentric gear with a different number of teeth rota# table on-the feed screw, a pinion adapted to mesh with both gears, and' meansfoi holding the second gear-stationary to permit the rot-ation ofthe hand wheel toope'rate4 the'feedscrew through the two gears and 14. In 'a grinding machine, thecombination with a grinding wheel slide and a feed screw for operating it, '0f a hand wheel ro- -tatable with respect to the feed screw, -a gear fixersl with respect to the 4feed screw, a con.-

r centric .gear having a. differentnumber ,of

teeth' rotatable with :respect- -to vthe lfeed screw, a. pinion meshi'ngffwith` both gears,

.and means' foriixing the second 'gear' tothe 'hand wheel whereby. the hand wheel will rotate the feed-screw at its own speed.

l5. 'In a 'grinding machine, the' combina.

rota-'te thefeed screw vat its. own speed-.

nftestim'ony whereofsI have hereunto set my hand, inI thepre'sence of two subscribing tion with a grii'iding wheel slide anda.. feed screw for operating'it, ofa hand Wheelrotatable with respect to 'the' feed` screw, a

gear rfixed vwith.respect to the feed screw, a

concentric gear having a different number of teeth rotatable' with respect to the feedy screw, ,a pinion meshing with both gears, and 'means for xing the-second 4gearto the l .tion with the hand'whee1 by power.

.tate the-.feed screw at its own speed,- said pinion being v carried by the hand wheel and being movable toa position in which it does not. engage the secondy gear for the purpose of throwing. the feed screw out 16. Ina grinding machine, the combina;A

tion with a grinding wheel slide and a feed screw lconnected therewith for feedingfit,

of a hand .wheel rotatable onthe feed screw, a gear fixed to the feed screw, a-.concentric v gear with a different number of teeth rota-'- table on the feed screw, va pinion adapted t0 mesh, with both gears, means for holding.' .the second gear 'stationary .to permit the rotationv of the hand wheel to feed the screw means for rotating'sa-id second gear slowly v175111 a grinding mae'ise'thecombim screw for operating it, of a-'hja-nd wheel rotatable with respect to the feedscrew, "a' -gear'fxed with respect tot-he feed screw, a

concentric gear having a different number of. `teeth 'rotatable withresp'ectto the feed screw, aj'pinion meshing with'both gears, l'and means for fixing the secondfgearto the',1

hand wheel whereby the' hand wheel will iionwith a grinding wheel-Sud@ mit fd'- ,60' 

